Roof hook



FIG. 1 is a perspective view of a roof hook;

FIG. 2 is a side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

In FIG. 1, the broken line showing of environmental structure and a second unclaimed roof hook is for purposes of illustrating the roof hook in a condition of use. The broken lines and the structure they depict form no part of the claimed design. 

The ornamental design for a roof hook, as shown and described. 